{"id":"W4411456473","doi":"10.1144/geoenergy2024-042","title":"Generation, migration and accumulation of natural hydrogen and helium in the intracratonic São Francisco Basin, eastern Brazil: implications for the understanding and exploration of natural H <sub>2</sub> systems","year":2025,"lang":"en","type":"article","venue":"Geoenergy","topic":"Hydrocarbon exploration and reservoir analysis","field":"Engineering","cited_by":8,"is_retracted":false,"has_abstract":true,"ca_institutions":"Carleton University; University of Toronto; University of Ottawa","funders":"Total","keywords":"Natural (archaeology); Structural basin; Natural gas; Geology; Hydrogen; Helium; Geography; Earth science; Paleontology; Ecology; Physics; Biology; Atomic physics","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0001668254,0.0002298628,0.0001460776,0.000477437,0.0003941658,0.0003949341,0.0002190628,0.0002378082,0.0003761038],"category_scores_gemma":[0.000445278,0.0001671281,0.0001329987,0.0004822444,0.0006090982,0.0003563603,0.0003674932,0.0001497154,0.00004642762],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.001092179,"about_ca_system_score_gemma":0.0005692223,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.1514611,"about_ca_topic_score_gemma":0.2651814,"domain_scores_codex":[0.9999511,0.000006436665,0.000003171972,0.00001921301,0.000009036849,0.00001099283],"domain_scores_gemma":[0.9998428,0.00003929662,0.0000546009,0.00001103787,0.00003749903,0.00001471489],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.0001008818,0.00001772406,0.9527516,0.0001029883,0.00005193147,0.0002457022,0.003017666,0.0009225673,0.02228284,0.0004689548,0.00009778599,0.01993939],"study_design_scores_gemma":[0.000002880734,0.00002993033,0.9953504,0.00001690091,0.00002355562,0.00007874776,0.001493107,0.0008304253,0.001009616,0.000125844,0.001032772,0.000005741966],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9990219,0.0002059999,0.000083855,0.00004071653,7.812025e-7,0.000003088625,0.00007399712,0.000004497791,0.0005652381],"genre_scores_gemma":[0.9993982,0.0001623833,0.0002455764,0.000007141112,7.45415e-7,0.000003188988,0.00005325915,0.000001600957,0.0001279884],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.1514611,"threshold_uncertainty_score":0.301159,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.04627580774413356,"score_gpt":0.2799971031163974,"score_spread":0.2337212953722638,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}